getTableSchemeImpl method

@override TableScheme? getTableSchemeImpl(String table, TableRelationshipReference? relationship, { Object? contextID, })

Implementation that returns a TableScheme for table.

• contextID should be Expando compatible. It informs that other calls to getTableSchemeImpl are in the same context and could have shared internal caches for the same contextID instance.

Implementation

@override
TableScheme? getTableSchemeImpl(
  String table,
  TableRelationshipReference? relationship, {
  Object? contextID,
}) {
  var tableScheme = tablesSchemes[table];
  if (tableScheme != null) return tableScheme;

  var entityHandler = getEntityHandler(tableName: table);
  if (entityHandler == null) {
    // A relationship table has no entity: its scheme is the 2 ID fields
    // (source and target) of the relationship.
    if (relationship != null) {
      var sourceId =
          '${relationship.sourceTable}_${relationship.sourceField}';
      var targetId =
          '${relationship.targetTable}_${relationship.targetField}';

      tableScheme = TableScheme(
        table,
        relationship: true,
        idFieldName: sourceId,
        fieldsTypes: {
          sourceId: relationship.sourceFieldType,
          targetId: relationship.targetFieldType,
        },
      );

      adapterLogger.info('relationship> $tableScheme');

      return tableScheme;
    }

    throw StateError(
      "Can't resolve `TableScheme` for table `$table`. No `EntityHandler` found for table `$table`!",
    );
  }

  var idFieldName = entityHandler.idFieldName();

  var entityFieldsTypes = entityHandler.fieldsTypes();

  var fieldsTypes = entityFieldsTypes.map(
    (key, value) => MapEntry(key, value.type),
  );

  tableScheme = TableScheme(
    table,
    relationship: relationship != null,
    idFieldName: idFieldName,
    fieldsTypes: fieldsTypes,
  );

  adapterLogger.info('$tableScheme');

  return tableScheme;
}